﻿// Copyright 2009-2021 Josh Close
// This file is a part of CsvHelper and is dual licensed under MS-PL and Apache 2.0.
// See LICENSE.txt for details or visit http://www.opensource.org/licenses/ms-pl.html for MS-PL and http://opensource.org/licenses/Apache-2.0 for Apache 2.0.
// https://github.com/JoshClose/CsvHelper
using System;

namespace CsvHelper.Configuration.Attributes
{
	/// <summary>
	/// The default value that will be used when reading when
	/// the CSV field is empty.
	/// </summary>
	[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter, AllowMultiple = false, Inherited = true)]
	public class DefaultAttribute : Attribute, IMemberMapper, IParameterMapper
	{
		/// <summary>
		/// Gets the default value.
		/// </summary>
		public object Default { get; private set; }

		/// <summary>
		/// The default value that will be used when reading when
		/// the CSV field is empty.
		/// </summary>
		/// <param name="defaultValue">The default value</param>
		public DefaultAttribute(object defaultValue)
		{
			Default = defaultValue;
		}

		/// <summary>
		/// Applies configuration to the given <see cref="MemberMap" />.
		/// </summary>
		/// <param name="memberMap">The member map.</param>
		public void ApplyTo(MemberMap memberMap)
		{
			memberMap.Data.Default = Default;
			memberMap.Data.IsDefaultSet = true;
		}

		/// <summary>
		/// Applies configuration to the given <see cref="ParameterMap"/>.
		/// </summary>
		/// <param name="parameterMap">The parameter map.</param>
		public void ApplyTo(ParameterMap parameterMap)
		{
			parameterMap.Data.Default = Default;
			parameterMap.Data.IsDefaultSet = true;
		}
	}
}
